Browns owner Jimmy Haslam expressed concern for the partying habits of Johnny Manziel in a chat with reporters on Saturday.

"I don't want to wear this subject out,'' Haslam said (via Cleveland.com). "Johnny said it himself. He made some mistakes. We expect better from him. I'm sure he'll perform now. We're anxious to see what he can do on the field, which is what really counts."

(Haslam) indicated that the Browns are working with Manziel to give him the guidance he needs.

"We put tremendous emphasis on working with our players both on and off the field,'' he said.

Since the draft, Manziel has been photographed partying from coast-to-coast with the likes of wild-child Justin Bieber and hip-hop star Drake, and tightly rolling a $20 bill in the bathroom of a nightclub.